Please continue!

Here are ideas:

Doctor 11: Geronimo!

War-Doctor: C'mon troops!
(he loads a blaster with ammo from his bandolier)

Doctor 10: Yo Rassilon! Come out! Or are you chicken!
Doctor 11: Yeah! Praise Rassilon! King of the cowards!
(they cluck to trick Rassilon to come out)

The War-Doc can use avlaster to destroy Rasilons gauntlet to save Doctr 11 and 10 during the last fight!

Wilf can scold Rassilon for how he abused his power!

Doctor 8 can use a double-bladed sword! Doctor 9 can use a pistol-sword (a shortsword with a gun on)! Doctor 10 can use a knightly sword! Doctor 11 can use a cutlass! War-Doc cab use a great sword from England! They can use them to fight Rassilon with his staff!

The Master can use a knightly sword or a cutlass!

Wilf: You wish for the Master to help! Well guess it's often these times when you must join forces with enemies to beat a common one!
Doctor 8: Sometimes I did so! All of me!

Doctor 9 and 10 can use banana peel to slip Rassilon up thus saving Wilf!

Wilf: You are odd!
War-Doctor: I know! Timey-Wimey is still consuging!

Wilf can use a Time Lord gun to help fight!

Romana can retun to help fight Rassilon! This version can own similar qualities to Doctor 10 or 11! Jolly as well as just and clever!

Wilf: This Romana is a nice one! Better than Mr Naughty!
Doctor 8: Yep!

Old companions can return! Rose can somehow appear! Maybe linked to the fight to come! Martha too! Ace! Mel! Grace! Jo! Tegan! Nyssa! Clara too!

Rassilon: You're angry! If you wish to take it out do it on the Master! HE used you lot!
Martha: Yes!
Rose: Martha! Shoot the Master and you'll become a monster! It's the reason the Daleks came to be! Murder! Revenge would consume you!
Rassilon: Ignore her!
Rose: Ignore him! Why is he keen for you to avenge your family! He's trying to make you a monster!
Grace: She's right! The Master did things! But revenge would consume you! I learned it from Star Wars! Look! Revenge consumed Rassilon! Go down the road and you become a monster!
Mel: I took revenge on Davros! And it haunts me!
Rassilon: You are weak!
Martha: You are! And I refuse to be as you are!
(she aims the blaster on Rassilon and fires knocking him off his throne)
Rassilon: You ruined my robe! Ow! My arm! You burned a bit of my arm!
Rose: You tried to turn Martha to a monster! You betrayed your own people!

Ace: Fire on the hole!
(she fires a bazooka on some tanks)

Doctor 8 can use a jelly-baby to lure a few dogs!

Rose can understand the War-Doctor well! She can comfort the old war-torn one!

Martha would too!

The Docs can enjoy some calming tea!

Ace would use a Gallifreyan pistol on a fe guards!

Rose: You got fob-watches!
War-Doctor: Yes!
Doctor 8: Yep!
Doctor 11: Yep!
Rose: Nice one!
Ace: My Doc owned one too!

Martha: Should I destroy the Master! If I do so it would be wrong!
The Master: You're too soft!
War-Doctor: She's being merciful! You can still come back!

Please add more!
Looking forward to how Wilf deals with more than one Doctor espeically the old ones! I bet he'd understand the war-one a lot due to being a soldier once during one of the world-wars!
The syp tells me there could be a Gallifreyan version of the war between King Charles the First and Cromwell! Ooooo! Good moment for all the Docs together! Fighting to save Gallifrey from Rassilon!

Great story so far!

please update soon

Ha, that was delightfully bonkers, starts all serious and becomes a right panto powerhouse performance by the Docs, and the return of that old chestnut "I'll explain later", cracking start